Telephone-mouthpiece



' w. M. PARKER.

. IELEPHONE MOUT'HPIECE.

APPLICATION EYILED DEC. 6, I917.

Patented Feb. 24, 1920.

avwwto'a ih'llz'amflParker attoznu:

WILLIAMM. PARKER, OF PARKERSBURG, WEST VIRGINIA.

TELEPHONE-MOUTHPIECE.

Specification of Letters Patent.

Patented Feb. 24, 1920.

Application filed December 6, 1917. Serial No. 205,768.

To all whomit mayconcern:

Be it known that 1, WILLIAM M. PARKER, a citizen of the United States,residing at Parkersburg, in the county of Wood and State of WestVirginia, have invented certain new and useful Improvements inTelephone-Mouthpieces, of which-the following is a specification.

This invention relates to mouth-pieces for telephones, and is directedparticularly to an improved type of mouth-piece which may be of materialknown to beextremely sanie tary.

At present, it issomewhat common practice to make these mouthpieces ofdark colored composition wherein the attaching threads and bell portionare integrally formed, but itis also well known that this material isporous to some considerable ex tent and also possesses more or lessadhesive property, which makes the device itself somewhat unsanitaryespecially when used in public places. I therefore aim to make the bellportion of my mouth-piece structure of a material which is itselfnon-porous, such as highly glazed porcelain and which bell portioncarries at its rear, a separate means whereby the mouthpiece as a wholeis attached to the telephone proper. It is impractical to make theattaching threads at the rear of the bell portion of porcelain orsimilar material, since this material is usually very brittle andcauses'the threads to break and sliver, which probably would result inthe injury of the instrument as a whole. For this reason, I preferablymake the mouth-piece of a glazed porcelain bell portion and a metallicrear end secured thereto, whereby the mouth-piece as a whole may beattached to the telephone instrument without injury to the same.

It is also my object to so arrange the structure that the bell portionis not detachable from the threaded attaching portion. It is well knownthat the transmitter portion of a telephone instrument is adjustablymounted slightly about a lionzontal pivot at its rear, this adjustmentbeing usually made by the speaker by grasping the bell portion. It is attlmes such as this that the bell portion should be in permanent holdingrelation with the transmitter to prevent its accidental detachment fromthe same. It will be readily apparent that continual detaching andattaching of the mouth-piece must in time work injury to the instrument;

Further objects of my invention will appear from the following detaileddescription of the accompanying sheet of. drawing? in which similarcharacters of reference desig nate corresponding parts, and. in which:

Figure 1 shows the upper portion of a telephone with my improved type ofmouthpiece applied.

Fig. 2 is a central vertical section of my 'mproved type of mouth-piece,showing the parts in assembled relation.

Fig. 3 is a central vertical section through the bell portion only.

Fig. a is a fragmentary central vertical section showing the manner inwhich the attaching member is permanently secured to the bell portion.

Fig. 5 is a grouped view showing the attaching member in perspective asit appears after it is permanently in the bell portion and also beforeits application thereto; and,

Fig. -6 is a vertical section through the rear socketed end of the bellmember.

In Fig. l, the telephonestand is designated by the reference numeral 1and is shown as being provided with the transmitter structure 2,preferably mounted thereon by means of the horizontal adjusting screw 3.To this transmitter structure there is secured the mouth-piece which, inthe present instance, comprises a bell portion a, and an attachingmember 5. Preferably the bell portion is made of highly glazed porcelainwhile the attaching member is preferably made of metal. This bellportion is of the same general shape as that now in use, being providedwith an interior transverse wall 6 having a series of apertures 7against which the voice is cast when talking. The rear end of this bellmember is also socketed as shown at 8, and is further provided with aseries of under-cut notched portions 9, which under-cut portions aredesigned to cooperate with the attaching member 5 in permanently holdingthe parts in assembled relation both as re ards a se aratin movement andas notched portions 9. It will be understood that the metal from whichthe prongs are struck is substantially unyielding to hold the prongs inplace but is suiiiciently pliable to permit them to assume theiroperating position. This is accomplished preferably by expanding atleast a portion of the neck portion, for instance by means of the toolshown at 12 in Fig. whereby the tongues 11 are caused to seat themselvesin the notched portions 9. It will be understood that this neck portionis mounted in this manner within the socketed end of the bell member insuch manner as to be permanently attached thereto when once applied, sothat the bell member may not be accidentally or even intentionallyremoved, such as might occur during the adjustment oi the transmitterstructure 2 about its, pivot bolt It will, therefore, appear that thelateral projections formed upon the neck portion of the attachingmember, as well as the attaching member itself are unyielding, and thatwhen once the parts are in assembled relation they will permanently soremain. The rear end of this attaching member is also provided withaseries of threads 13, for use in attachment to the transmitterstructure. The parts are so arranged also, that a shoulder portion 1 ispresented between the neck portion 10 and the threaded end 13 forabutment against the rear end 15 of the bell member.

From the foregoing description taken in connection with the accompanyingsheet of drawings, it will be apparent that I have provided a type ofmouth-piece possessing movement. In this manner it is extremelyunlikelythat the telephone instrument itself may be injured because of itsmouth-piece attachment.

What I claim is:

A telephone mouth-piece comprising a bell member formed with atransverse wall intermediate its ends and formed to present a socketedrear end, said socketed end having a plurality of notches formedtherein, a cylindrical attaching member formed with the shoulder againstwhich the rear end of said bell member abuts, tongues struck from theforward end of said attaching member and bent to it said notches tosecure said two members together and also to prevent a relative rotationbetween them, and threads H. B. GROVE, R. E. SAMUELS.

